2 layers39.6 × 35.2 mm
KartEye pcb gimbal
jbulikk/EyeKart
A gimbal system that mimics the user's head movements in real time. The project is divided into two cooperating parts: a transmitting unit and a receiving unit.
38 parts
2 layers67 × 43 mm
KartEye IMU
jbulikk/EyeKartA gimbal system that mimics the user's head movements in real time. The project is divided into two cooperating parts: a transmitting unit and a receiving unit.
- Size
- 67 × 43 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 63
- Nets
- 67
- Pads
- 214
- Tracks, vias
- 562, 241
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 29 Mar 2025
- Updated
- 13 Jul 2025
Overview
KartEye IMU is an open-source printed circuit board by jbulikk, from the jbulikk/EyeKart repository on GitHub. It is a 2-layer board of 67 × 43 mm with 63 parts on 67 nets, routed with 562 tracks and 241 vias.
It is built around the ICM-20948, MIC5225-1.8YM5-TR and BSS138. Its parts include 32 resistors, 7 capacitors, 7 transistors, 4 ICs and 3 connectors. It belongs with the sensors and measurement boards and the nRF52 and nRF5x boards of this library.
Main components
3
ICM-20948
QFN-24(3x3)-40℃~+85℃ 0.5KB 1.71V~3.6V 16bit 8uA Accelerometer Gyroscope SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps QFN-24(3x3) Accelerometers ROHSTDK InvenSenseAccelerometers
MIC5225-1.8YM5-TR
SOT-23-5-40℃~+125℃ 1 1.8V 150mA 16V 450mV@(150mA) Fixed Over Current Protection、Over Temperature Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMicrochip TechnologyVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs
README
README.mdEyeKart
A gimbal system that mimics the user's head movements in real time. The project is divided into two cooperating parts: a transmitting unit and a receiving unit.
-
The transmitting module uses an IMU sensor to capture the user's head orientation.
-
The motion data is processed and wirelessly transmitted to the receiving module.
-
The receiving module interprets the incoming data and controls servo motors to adjust the mechanical gimbal accordingly, replicating the user's head movement.
Overview
Parts
63| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 22 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R20, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31, R32 |
| 10 | 4.7k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7, R8, R9, R10, R11, R12, R13, R14, R15, R16 |
| 5 | 0.1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C4, C5, C6, C7 |
| 5 | BSS138 | Package_TO_SOT_SMD:SOT-23_Handsoldering | Q1, Q2, Q3, Q4, Q5 |
| 4 | SolderJumper_3_Open | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm_NumberLabels | JP1, JP2, JP3, JP4 |
| 3 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6, R19, R21 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R17, R18 |
| 2 | 5M | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 2 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1, J2 |
| 2 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_DIN965_Pad | H1, H2 |
| 2 | TestPoint | TestPoint:TestPoint_Pad_1.0x1.0mm | TP1, TP2 |
| 1 | 1.0u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 1 | 2.2k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | 2.2u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
| 1 | 330 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 1 | 47k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | BQ297xy | Package_SON:WSON-6_1.5x1.5mm_P0.5mm | U2 |
| 1 | Battery_Cell | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | BT1 |
| 1 | CHG | Package_SON:VSON-8_3.3x3.3mm_P0.65mm_NexFET | Q6 |
| 1 | Conn_ARM_JTAG_SWD_10 | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical_SMD | J6 |
| 1 | DCHG | Package_SON:VSON-8_3.3x3.3mm_P0.65mm_NexFET | Q7 |
| 1 | ICM-20948 | Sensor_Motion:InvenSense_QFN-24_3x3mm_P0.4mm | U4 |
| 1 | MIC5225-1.8YM5-TR | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_CK_RS282G05A3 | SW1 |
| 1 | XIAO-nRF52840-SMD | Seeed Studio XIAO Series Library:XIAO-nRF52840-SMD | U1 |
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Questions
How big is the KartEye IMU PCB?
It measures 67 × 43 mm and has 2 copper layers, 1.6 mm thick.
What parts does the KartEye IMU use?
63 parts, built around the ICM-20948, MIC5225-1.8YM5-TR and BSS138. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the KartEye IMU KiCad files?
From the jbulikk/EyeKart repository on GitHub, at the commit this page was made from: the board is Hardware/IMU_board/KartEye_IMU.kicad_pcb and its schematic Hardware/Gimbal_board/KartEye_pcb_gimbal.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the KartEye IMU design in my own project?
Its repository states no licence, so its author keeps all rights: ask jbulikk before reusing the design.